The Books of Magic #6: Reckonings (Jablonski, Carla. Books of Magic, #6.)

Timothy Hunter is just like any other thirteen-year-old boy in London . . . except for the tiny fact that he might be the most powerful magician of his time. The time has come for Tim to uncover the truth about himself, his parents, and his magic once and for all. But first he has to make some difficult choices—and risk a dangerous trip to confront the Faerie Queen, who wants him dead. Concerned that he might become evil and endanger his girlfriend in the future, thirteen-year-old Timothy Hunter returns to Faerie to get the truth about his parentage and his magic once and for all.